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From David Jencks <>
Subject Re: Make <useMavenDependencies> default true ?
Date Wed, 10 Oct 2007 15:50:43 GMT

On Oct 10, 2007, at 7:14 AM, Paul McMahan wrote:

> On Oct 10, 2007, at 2:26 AM, David Jencks wrote:
>> 0. As at present, any dependency in the c-m-p config must already  
>> be in the pom dependencies.
>> 1. All the (compile, runtime) scoped maven dependencies in the pom  
>> turn into plan dependencies and geronimo-plugin.xml dependencies
>> 2. Unless overridden the import type is "all"
>> 3. For other import types or other customization a dependency can  
>> be mentioned in the c-m-p config in the pom.
> #1-3 look right on.  I'm wondering if #0 is really necessary and  
> desirable.   For example,  if I create plugin1 that needs a service  
> type dependency against plugin2 then the pom could look like:
> <project>
>     <artifactId>plugin1</artifactId>
>     <dependencies>
>            // a reference to plugin2 is not desirable here, don't
>            // want maven processing it as a build time dep or
>            // including its classes in the environment inherited
>            // by car-maven-plugin
>     </dependencies>
>     <build>
>         <plugin>
>                 <artifactId>car-maven-plugin</artifactId>
>                 <configuration>
>                         <dependency>
>                               <artifactId>plugin2</artifactId>
>                               <import>service</import>
>                         </dependency>
>                 </configuration>
>         </plugin>
>     </build>
> </project

#0 is necessary to help maven build the modules in a correct order.   
I believe we have successfully written the c-m-p so the maven  
dependencies have no effect on the c-m-p environment, only on the  
configuration that the c-m-p is "compiling" .  Basically the c-m-p  
fires up a small geronimo instance, and the root classloader of that  
geronimo instance is the root maven classloader, without any of the  
maven dependencies in it.  Then we load dependencies of the module we  
are constructing into this geronimo instance just like a standalone  
geronimo server does.  So, the only effect these maven dependencies  
have is to assure build order and to contribute to the geronimo  
module classloader according to the rules above.

make sense?

david jencks

> Best wishes,
> Paul

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